September weather forecast
Baucau, East Timor

As September sets in, the prolonged dry period gradually starts transitioning to the wet season once again. Baucau's weather in September, however, is typified by sun-drenched days marked by increased sunshine hours. The UV index is consistently high and requires careful safeguarding against excessive sun exposure. Sea temperatures return to their annual high, providing excellent conditions for water-based activities. Despite this returning trend towards the tropical monsoon climate, September remains essentially dry.

Temperature

September in Baucau, East Timor, welcomes an average high-temperature of a still moderately hot 29.4°C (84.9°F), not much different from the preceding month. Baucau sees an average low-temperature of 18.5°C (65.3°F) during September.

Heat index

In September, the average heat index is estimated at a hot 31°C (87.8°F). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

The least humid month is September, with an average relative humidity of 55%.

Rainfall

September is the month with the least rainfall, with 5mm (0.2") of accumulated precipitation.

Sea temperature

July through September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of the month, sunrise is at 06:35 and sunset at 18:32. On the last day of September, in Baucau, sunrise is at 06:18 and sunset at 18:29 +09.

Sunshine

The average sunshine in September is 10h.

UV index

The months with the highest UV index are January through April, August through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 12 in September interprets into the following recommendations:
Adopt every precaution of necessity, unprotected skin and eyes may suffer burns instantly. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. A sunscreen with at least SPF 30 should be used liberally and reapplied frequently on cloudy days, especially after swimming or an outdoor workout. Warning! Sand and water reflections boost the intensity of UV exposure.